Home / 3,178.13-4,385.13-1,851.06

Finding the Fourth Proportional to 3,178.13, 4,385.13 and 1,851.06

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Solution

The fourth proportional to 3,178.13, 4,385.13 and 1,851.06 is: 2,554.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.13 : 4,385.13 = 1,851.06 : x
  2. Step 2: Convert to fraction form
    3,178.13/4,385.13 = 1,851.06/x
  3. Step 3: Cross multiply
    3,178.13x = 4,385.13 × 1,851.06
  4. Step 4: Simplify right side
    3,178.13x = 8,117,138.74
  5. Step 5: Solve for x
    x = 8,117,138.74/3,178.13
  6. Step 6: Final answer
    x = 2,554.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.